1-1. COOLING AND DRY OPERATION
1-1-1. COOLING AND DRY CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature,
and controls the operation speed of the compressor.
The outdoor unit operates according to the highest request capacity of indoor unit
to meet the demand capacity of all the indoor units.
The capacity control of the low request capacity indoor unit is controlled by Branch box EEV.
Minimum Maximum
( Table 1 : Compressor speed range )
01-01
AOYG45LAT8
18rps
90rps
When the start-up control finished, the outdoor unit starts the target low pressure control.
The outdoor unit selects the target low pressure within the following range,
it is decided by the highest request capacity from indoor units.
1.90MPa
1.62MPa
3.30MPa
2.33MPa
The outdoor fan speed is controlled to keep the high pressure to the constant range for stabilizing
the distribution performance.
( Fig. 1 : Target high pressure range)
< Target high pressure control >
< Target low pressure control >
( Fig. 2 : Target low pressure range)
0.82MPa
1.27MPa
Target high pressure
Target low pressure
High
pressure
Outdoor
temperature
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